Definition: You are given a question on global facts. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: The global HIV/AIDS death rate is highest for which of these age groups?
(A)Under 5 (B)14-May (C)15-49 (D)over 50

C